Examples of tropes the XP-verse does differently from both X-men comics and movieCanon:

Overall Game Tropes

Any Torment You Can Walk Away From: Subverted; XP is big on consequences, either at a personal level, or at a game-wide level. For example, the destruction of San Diego in The Rictor Effect has resulted in massive reconstruction and any number of political ramifications, as well as the ‘creation’ of the mutant serial killer in Aftershocks.

Alternate Continuity: We diverted from the movieverse at the end of X2. Jean has never been the Phoenix; Charles and Scott are alive; Magneto never lost his powers and is still running around with the Brotherhood.

The Big Board: The X-Men have their nifty table-top hologrammatic display. X-Factor has a whiteboard. X-Force has Wanda and Amanda’s Wall of Paper With Scribbles.

Bonus Material: The wealth of recordings, art, non-canon writing pieces and other creative works produced by players and fans. We put them all in one place so they're easily found.

The Tasteless But True Story: Avoided like the plague in XP; we’ll use small events as inspiration, but we steer away from using RL tragedies for game fodder. Partly because injecting mutants into the world makes everything different, but mostly because it's just tacky.

Character Blog: for day-to-day interactions, plot fleshing out, IC communications and group discussions.

Geographic Flexibility: From the mansion, which has had various rooms added to it over the years, to Salem Center and District X and international locations like Madripoor, Symkaria and Attilan, it’s not there until we need it.

Goal in Life: Kind of helpful when you’re applying, even if things don’t wind up working out the way you’d planned.

Harmful to Touch: Nico’s Staff of One doesn’t appreciate being manhandled; neither does Illyana’s Soulsword.

Lampshade Hanging: Jokes about “living in a comic” are kind of frequent, as are jokes about time travel not being an option for fixing things (XP bans time-travel as a plot device/character trait to avoid the Marvel madness).

Retcon: A mod power only used sparingly and with full game approval. It’s been used only a handful of times: the Logan/Bobby hookup; Anole Mark 1; Nuke; the Jean-Paul and Jeanne-Marie shower scene.

Shout-Out: Take a shot for every Whedonverse reference you can find. Proceed to die of alcohol poisoning. Ditto World of Warcraft references.

Spin-Off: X-Force was first proposed as a spin off game from XP, before being folded into the main game; in terms of the ‘fictional television series’ trope players use sometimes, X-Force is a spin off show, as is X-Factor and The New Mutants.

Sympathy for the Devil: Even though it bites him time and again, Charles Xavier always gives people a chance. Sometime two or three.

Take That: One of XP’s claims to fame is “doing it better than the comics”. Thus we have a Scarlet Witch who isn’t godly powerful _or_ insane, Hellions who are still alive, Amanda Sefton _isn’t_ dating her brother (ew!), Penance isn’t any of the St. Croix family, an X-23 who was an ordinary high school cheerleader before she manifested...

Time Marches On: Applicable to XP in that we operate in real time, which means everyone’s getting older, day by day. Students graduate, older team members find themselves thinking of retirement, and there are no retcons.